OBJECTIVES We evaluated the central auditory pathways in workers with noise-induced tinnitus with normal hearing thresholds, compared the auditory brainstem response results in groups with and without tinnitus and correlated the tinnitus location to the auditory brainstem response findings in individuals with a history of occupational noise exposure. METHOD Sixty individuals participated in t...

This paper presents a 4th order CLCL resonant converter which is suitable for constant current power supply applications. This converter is designed with Immittance characteristic with two inductors and two capacitors in resonant network. A detailed analysis and design process of a 200w converter as a constant current supply have been provided and simulation results are verified with results of...

UNLABELLED Mismatch Negativity is an endogenous potential which reflects the processing of differences incurred in the acoustic stimulus. AIM to characterize MMN responses in elderly subjects and compare with adult subjects. MATERIALS AND METHODS prospective study involving 30 subjects, 15 men and 15 women, aged between 60 and 80 years and 11 months. Statistical test: Mann-Whitney. The subj...

Background: the suppression effect with contralateral white noise observed in the brainstem auditory evoked potential can be influenced by the efferent auditory system. Aim: to evaluate the suppression effect with contralateral white noise in the Brainstem Auditory Evoked Potential of individuals with normal hearing. Methods: 25 individuals, ranging in age from 18 to 30 years, of both genders, ...

Understanding analog circuit design primarily invloves becoming familiar with passive RC and RLC networks. This is due to the fact that circuit essentially involves active elements embedded in a network of parasitics: resistors, inductors and node capacitors. Other important signal processing circuits which are made up of passive elements are attenuators, ADCs and R-2R ladder networks in DACs. ...

An adaptive multi-rate wideband (AMR-WB) code is a speech codec developed on the basis of an algebraic code-excited linear-prediction (ACELP) coding technique, and has a double advantage of low bit rates and high speech quality. This coding technique is widely used in modern mobile communication systems for a high speech quality in handheld devices. However, a major disadvantage is that a vecto...